National Oceanic and Atmospheric Administration National Weather Service United States Department of Commerce
Current conditions at

San Antonio, San Antonio International Airport (KSAT)

Lat: 29.53°NLon: 98.46°WElev: 807ft.

Mostly Cloudy

81°F

27°C

Humidity 82%
Wind Speed SE 13 mph
Barometer 30.11 in (1017.5 mb)
Dewpoint 75°F (24°C)
Visibility 10.00 mi
Heat Index87°F (31°C)
Last update 15 Aug 12:51 am CDT
Extended Forecast for

San Antonio International Airport TX

  • Overnight

    Overnight: Mostly cloudy, with a low around 78. South southeast wind around 10 mph, with gusts as high as 20 mph.

    Low: 78 °F

    Mostly Cloudy

  • Saturday

    Saturday: Mostly cloudy, then gradually becoming sunny and hot, with a high near 99. Heat index values as high as 105. South southeast wind 5 to 10 mph, with gusts as high as 20 mph.

    High: 99 °F

    Hot

  • Saturday Night

    Saturday Night: Increasing clouds, with a low around 76. South southeast wind 5 to 15 mph, with gusts as high as 20 mph.

    Low: 76 °F

    Increasing
    Clouds

  • Sunday

    Sunday: Mostly cloudy through mid morning, then gradual clearing and hot, with a high near 99. Heat index values as high as 103. South southeast wind around 5 mph.

    High: 99 °F

    Hot

  • Sunday Night

    Sunday Night: Mostly clear, with a low around 76. Southeast wind 5 to 10 mph, with gusts as high as 20 mph.

    Low: 76 °F

    Mostly Clear

  • Monday

    Monday: Sunny and hot, with a high near 99. Calm wind becoming south southeast around 5 mph in the afternoon.

    High: 99 °F

    Hot

  • Monday Night

    Monday Night: Mostly clear, with a low around 78. Southeast wind 5 to 10 mph.

    Low: 78 °F

    Mostly Clear

  • Tuesday

    Tuesday: Sunny and hot, with a high near 100. South wind around 5 mph.

    High: 100 °F

    Hot

  • Tuesday Night

    Tuesday Night: Mostly clear, with a low around 76. South southeast wind 5 to 10 mph, with gusts as high as 20 mph.

    Low: 76 °F

    Mostly Clear

Detailed Forecast

Overnight
Mostly cloudy, with a low around 78. South southeast wind around 10 mph, with gusts as high as 20 mph.
Saturday
Mostly cloudy, then gradually becoming sunny and hot, with a high near 99. Heat index values as high as 105. South southeast wind 5 to 10 mph, with gusts as high as 20 mph.
Saturday Night
Increasing clouds, with a low around 76. South southeast wind 5 to 15 mph, with gusts as high as 20 mph.
Sunday
Mostly cloudy through mid morning, then gradual clearing and hot, with a high near 99. Heat index values as high as 103. South southeast wind around 5 mph.
Sunday Night
Mostly clear, with a low around 76. Southeast wind 5 to 10 mph, with gusts as high as 20 mph.
Monday
Sunny and hot, with a high near 99. Calm wind becoming south southeast around 5 mph in the afternoon.
Monday Night
Mostly clear, with a low around 78. Southeast wind 5 to 10 mph.
Tuesday
Sunny and hot, with a high near 100. South wind around 5 mph.
Tuesday Night
Mostly clear, with a low around 76. South southeast wind 5 to 10 mph, with gusts as high as 20 mph.
Wednesday
Sunny and hot, with a high near 100.
Wednesday Night
Clear, with a low around 77.
Thursday
Sunny and hot, with a high near 101.
Thursday Night
Mostly clear, with a low around 77.
Friday
Mostly sunny and hot, with a high near 101.
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ABOUT THIS FORECAST

 
Point Forecast:
San Antonio International Airport TX
 29.53°N 98.48°W (Elev. 817 ft)
Last Update:
12:42 am CDT Aug 15, 2026
Forecast Valid:
1am CDT Aug 15, 2026-6pm CDT Aug 21, 2026
 
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